Sierra Wireless EM7345 AT commands AT commands are very helpful for troubleshooting your device and changing the settings that are not available from standard Windows settings. For example, you can choose the access technology – 2G, 3G, 4G and even stick to particular frequency bands.
EM7345 is using Intel (formerly Infineon) AT command set and it’s not compatible with Quallcomm AT command set. All basic AT commands like AT+CFUN are more or less the same for all 3G/4G devices, but advanced ones, starting from AT+X, are unique to Intel XMM platform devices.
Yesterday I’ve been checking on Lenovo drivers website and have noticed that they added the X250 model. And what did I find there? Sierra Wireless EM7345 Software for Windows 8.1 (32-bit, 64-bit) – ThinkPad version 1.11.10610.4225, released on 12/16/2014 . So Lenovo doesn’t update WWAN drivers for their “old” models, like X240 or T440 and the latest drivers out there are dated July 31. So I downloaded it, unpacked it and found the following EM7345 firmwares inside:
WARNING!!! The instructions in this post are applicable only to EM7345 installed in Lenovo laptops!! For example, models T440, X240, X1 Carbon 2nd and 3rd gen, X250. For tablets or other devices don’t use the firmware given in this post, you can brick your EM7345!
Unfortunately, the default factory EM7345 firmware version (1.1) has some bugs. For example, after connecting to a LTE network and then disconnecting manually, the network status of the connection was changing for me to “No service” until device restart.
Sometimes it’s useful to know what’s going on under the hood. Almost all modern 3G and 4G modules offer an AT command interface to run AT commands.
What can you do using AT commands? To name just a few:
Check the cellular signal strength. Lock your EM7345 to use only 2G, 3G, or 4G if you have such a need. Check for some problems, for example if your newly bought EM7345 is SIM-locked to some provider.
Recently I bought this all-band LTE 4G card for my Lenovo X240 laptop. Unfortunately, Lenovo X240 BIOS contains a whitelist of allowed 4G devices, and EM7345 is the only solution officially available for the European LTE bands.
Device specifications:
Chipset: Intel XMM7160 LTE bands: B1, B2, B3, B4, B5, B7, B8, B13, B17, B18, B19, B20 (12 bands total). This is awesome as the device is really ready to work world-wide.
